/*
 * Copyright 2003 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cn.taketoday.context.cglib.core;

/**
 * The <code>GeneratorStrategy</code. is responsible for taking a
 * {@link ClassGenerator} and producing a byte array containing the
 * data for the generated <code>Class</code>. By providing your own strategy you
 * may examine or modify the generated class before it is loaded. Typically this
 * will be accomplished by subclassing {@link DefaultGeneratorStrategy} and
 * overriding the appropriate protected method.
 *
 * @see AbstractClassGenerator#setStrategy
 */
@FunctionalInterface
public interface GeneratorStrategy {

  /**
   * Generate the class.
   *
   * @param cg
   *         a class generator on which you can call
   *         {@link ClassGenerator#generateClass}
   *
   * @return a byte array containing the bits of a valid Class
   */
  byte[] generate(ClassGenerator cg) throws Exception;

  /**
   * The <code>GeneratorStrategy</code> in use does not currently, but may in the
   * future, affect the caching of classes generated by
   * {@link AbstractClassGenerator}, so this is a reminder that you should
   * correctly implement <code>equals</code> and <code>hashCode</code> to avoid
   * generating too many classes.
   */
  boolean equals(Object o);
}
